Comfort backrest



FIG. 1 is a perspective view of the comfort backrest, showing my new design;

FIG. 2 is a plan view taken from the front thereof;

FIG. 3 is a right-side view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for the comfort backrest, as shown and described. 